PDF malware analysis — malicious · db75c586c779919b

MALICIOUS

PDF

12.1 KB

MD5: b475bcf0a93e8c83143f970c3ac444de SHA-1: 3df9fa56087f4b7df91d7ae57d267a3c3ddc85ac SHA-256: db75c586c779919b1843dd3b8d149e633bae1406a9ea76af0d20b8e6744d562c

138 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript T1204.001 Malicious Link T1204.002 Malicious File

The file is a PDF containing embedded JavaScript, which is used to exploit the CVE-2007-5659 vulnerability. The heuristic firings indicate that the PDF launcher concatenates info fields, extracts characters at a fixed stride, and evaluates the result. This process likely leads to the execution of a second-stage payload, as suggested by the extracted JavaScript files. The ClamAV detection further confirms its malicious nature.

Heuristics 5

Collab.collectEmailInfo — CVE-2007-5659 critical CVE exact CVE_2007_5659

PDF JavaScript calls Collab.collectEmailInfo — CVE-2007-5659 is a buffer overflow in Adobe Reader triggered by a long argument or heap-sprayed message field passed to Collab.collectEmailInfo(). Part of a series of Acrobat JS API exploits. (identified after JavaScript deobfuscation)
ClamAV: Pdf.Exploit.Agent-36062 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-36062
JavaScript action low PDF_JAVASCRIPT

PDF contains a /JavaScript action. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
Embedded JS stream low PDF_JS

PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
Suspicious extracted artifact info EXTRACTED_FILE_STATIC_TRIAGE

One or more files extracted from inside this sample matched static suspicious-content checks such as script obfuscation, encoded payload blobs, packed data, or execution/download terms.

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0007_000.js` `068944f8c011a88ab770b45c6de142b9305a1f515d410204d5eadd9ac2b5bfb3`	pdf-javascript-stream	PDF /JS object 7 at offset 0x19B	373 bytes
`legacy_pdfkit_stage_000.js` `4e938c6faf8d62dc96764a5af74cea311b10e8a17004684e1cfe63d5d9427ae4`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	11816 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `0824dc1c60b000b11e08218dea742ba6baba17aee305476b82358a6891b1fad1`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	4839 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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